Concur & i do refuse neighbors. Ask any mower shop how often they get repairs from somebody who loaned somth'n .Could tell some horror stories of new mowers coming back seized 2 & 4 stroke. I re-rung an old victa 550 even put new bearings in it. Loaned it to my brother (who knows about motors & knows to use 2 stroke fuel mix ffs he had a 2 stroke motor bike) do i need to continue. Then he got himself a new mower,after a time didn't check the oil level,i get a phone call. I had to get him a new motor & fit it. Unbelievable ! . People check their car engine oil level never their mower i kid you not.. Never ever start a 4 stroke before you have checked the oil. Then check the crank when your finished (anything wrapped around the crank will rip that seal right out especially thin fishing line & thin flax like stuff), also tells you if you have a prob with oil loss. However customers never listen then they pay the price.